fe-mcm-22 catalyzed multicomponent synthesis of dihydropyrano [2,3-c] pyrazole derivatives
نویسندگان
چکیده
the fe-mcm-22 zeolite was found to be an efficient solid heterogeneous catalyst for synthesis of dihydropyrano [2,3-c] pyrazoles via one pot four component reaction of ethyl acetoacetate, hydrazine hydrate, aromatic aldehyde and malononitrile in aqueous alcohol. the catalyst was synthesized by hydrothermal method under autogenous pressure and modified by fe (iii) ion exchange. the prepared catalyst was characterized by x-ray diffraction (xrd), scanning electron microscopy-energy dispersive spectroscopy (sem-eds), fourier transform infrared spectroscopy (ft-ir), and brunauer-emmett-teller (bet) measurement technique. this ecofriendly protocol provides several advantages such as use of an inexpensive catalyst, short reaction time, mild reaction condition, simple work-up, good to excellent yield and reusability of the catalyst.
منابع مشابه
Fe-MCM-22 catalyzed multicomponent synthesis of dihydropyrano [2,3-c] pyrazole derivatives
The Fe-MCM-22 zeolite was found to be an efficient solid heterogeneous catalyst for synthesis of dihydropyrano [2,3-c] pyrazoles via one pot four component reaction of ethyl acetoacetate, hydrazine hydrate, aromatic aldehyde and malononitrile in aqueous alcohol. The catalyst was synthesized by hydrothermal method under autogenous pressure and modified by Fe (III) ion exchange. The prepared cata...
متن کاملFe-MCM-22 catalyzed multicomponent synthesis of dihydropyrano [2,3-c] pyrazole derivatives
The Fe-MCM-22 zeolite was found to be an efficient solid heterogeneous catalyst for synthesis of dihydropyrano [2,3-c] pyrazoles via one pot four component reaction of ethyl acetoacetate, hydrazine hydrate, aromatic aldehyde and malononitrile in aqueous alcohol. The catalyst was synthesized by hydrothermal method under autogenous pressure and modified by Fe (III) ion exchange. The prepared cata...
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عنوان ژورنال:
iranian journal of catalysisجلد ۷، شماره ۱، صفحات ۱-۹
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